Molded pulp article



Afi 4, 1936. M. P. C'WAPLl-N 2,050,206

MOLDED PULI-T ARTICLE Filed Dec. 21, 1954 2 SheetsSheet 1 M/vEA/mk Her/eP Chap/M ATTORN mum Aug. 4, 1930. M. P. CHAPLIN 2,050,206

MOLDED PULP ARTICLE Fi led Dec. 21, 1954 2 Sheets-Sheet 2 Patented Aug.4, d 1936 PATENT OFFICE 050,206 MOLDED PULP ARTICLE Merle P. Chaplin;Waterville', Maine, assignor, by

mesne assignments, to The Canal National Bank of Portland, as trustee,Portland, Maine Application December 21, 1934. Serial No. 758,645

' Claims. (01. 229-25) This invention relates to an article in the formof a plate or dish made of paper pulp preferably by a method ofmanufacture consisting of molding it directly from a liquid pulp mixtureinto the 5 desired shape and form.

In my prior Patents Nos. 1,748,865. and 1,748,911 I disclosed 'a platemade of fibrous materials which was circular in design and possessedcertain characteristics which made it adequate for the purpose thenintended.

My present invention has to do with an im proved article which providesa greater space for the food placed in the plate or dish, provides anarticle of greater mechanical strength and i5 rigidity and is moreattractive in design and appearance.

Other objects of the invention are apparent from the followingdescription and drawings.

Fig. 1 is a top view of one of my designs.

20 Fig. 2 is a sectional view onv line 2-2, Fig. -1.

Fig. 3 is a top view of a modified design of my article.

Fig. 4 is an enlarged sectional view through the plan channel rimsection.

25 Fig. 5 is an enlarged sectional view through the channel rim sectionwith the addition of a reinforced edge section.

In my two prior designs above referred to I provided a plain channel rimsection or'a channel rim 30 section plus a reinforced edge section whichwas circular in shape. In other words the flanges of the channel sectionare curved and one is con-.

siderably longer than the other. While this chan nel rim sectionprovided a much stronger article 45 relatively flat portions 4 whichcorrespond to the web of a common channel section, and the sections 5and 6 which correspond to flanges of a common channel section. It willbe observed that the rim sections 2 are composed of four relative- 50 lylong straight portions and four relatively short curved portions whichjoin the ends of the straight portions so that the plate or dish may becompletely enclosed. While my preferred form of design shows four 55relatively long straight sections of channel shape curved slightlyinwardly. This slight inward I may without departing from the scope ofmy invention provide a greater number of straight sections such as sixor eight. These may be connected together by curved channel, sectionsshorter than those shown on either Figs. 1 or 3 or 5 be joined directlytogether without the use of a curved section. I

In Fig. 3 I show a modified design in which the four channel rimsections are shown to be 0 curve does not detract materially from thefull utilization of the channel section design 'as regards strength andrigidity but actually acts to offset any tendency oftipping or twistingthese channel sections due to their being connected together atright-angles at their ends by the short curved sections. It alsoprovides an article of somewhat more attractive appearance than thatdisclosed in Fig. 1.

By providing a substantial part of the rim section of my article ofsubstantially straight sections and connecting these with short curvedsections having a relatively small radii I not ,only utilize the maximummechanical advantage and strength of a channel section but also secure amaximum of article capacity in proportion to the size of the article andthe paper pulp materials used therein.

It will be noted that. in Figs. 2 and 4 I show a reinforced edge sectionsimilar to that disclosed in my prior Patent 1,748,911.

Also I show in Fig. 5 a plain channel flange section without edgereinforcement as disclosed in my prior Patent No. 1,748,865.

I do not limit myself to the use of either the plain channel rim sectionor the channel rim section with the addition of the reinforced edge Isection in either of the designs shown in Figs. 1 or 3. These two typesof sections may be used with either of the above designs as best suitsthe purpose intended.

in my prior designs where the rim section was curved at all points. i

What I desire to claim by Letters Patent is:- 1. An article of the classdescribed having a bottom portion, relatively flat, a rim channelshapedin cross-section, said section comprising a web and two' angle portions,said rim consisting of a plurality of relatively straight portionsintegral with a plurality of curved portions.

2. An article of the class described having a bottom portion relativelyflat and substantially square in outline and an enclosing rim portionintegral with the bottom portion and channelshaped in cross-section,said section comprising a web and two angle portions, and said webportion being inclined inwardly towards said flat portion.

3. An article of the class described having a substantially flat bottom,a plurality of inwardly curved channel-shaped rim portions and aplurality oi outwardly curved channel-shaped rim portions, each of saidrim portions in section comprising a web and two angle portions.

4. An article of the class described having a relatively flat bottomsubstantially square in outline with slightly rounded corners, anenclosing rim portion integral with said bottom portion MERLE P.CHAPLIN.

